package com.wuyou.programmingIdeas.Chapter9interface.part1;

/**
 * @Description
 * @Author 无忧
 * @Date 2023/12/19 21:17
 */
public class Waveform {

    private static long counter;

    private final long id = counter++;

    public String toString(){
        return "Waveform " + id;
    }
}
